/Engine/Source/Editor/UnrealEd/Public/EditorActorFolders.h
Get a new default folder name that would apply to the current selection
[FFolder](API\Runtime\Engine\FFolder) GetDefaultFolderForSelection ( [UWorld](API\Runtime\Engine\Engine\UWorld) & InWorld, [TArray](API\Runtime\Core\Containers\TArray)< [FFolder](API\Runtime\Engine\FFolder) > * InSelectedFolders )